Got this story by way of the Loadstar.
Reading the story I am impressed by the level of incompetence management showed. But in the view of the traveler (customer) the union will be blamed. So more anti-union sentiment will be generated.
In this case it is clearly a management mess-up. Why shouldn’t the union call them out? Why should the union go overboard to help management out of the mess? Why should temporary and part time workers get overtime pay for standard hours (for airline crews) in violation of the union contract?
What customers see is a flight that is canceled. If management says “It’s the union’s fault!” it would be lying. Laying blame on the union is not fair.
via 
Supply Chain and Logistics 